155885783040 has 1152 divisors, whose sum is σ = 621035251200. Its totient is φ = 37265080320.

The previous prime is 155885783023. The next prime is 155885783063. The reversal of 155885783040 is 40387588551.

155885783040 is a `hidden beast` number, since 1 + 5 + 588 + 57 + 8 + 3 + 0 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1973237721 + ... + 1973237799.

It is an arithmetic number, because the mean of its divisors is an integer number (539093100).

Almost surely, 2^155885783040 is an apocalyptic number.

155885783040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155885783040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310517625600).

155885783040 is an abundant number, since it is smaller than the sum of its proper divisors (465149468160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155885783040 is an equidigital number, since it uses as much as digits as its factorization.

155885783040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 5376000, while the sum is 54.

The spelling of 155885783040 in words is "one hundred fifty-five billion, eight hundred eighty-five million, seven hundred eighty-three thousand, forty".